code: def testWriteBinaryMode(self):
      file_path = os.path.join(self._base_dir, "temp_file")
      gfile.GFile(file_path, "wb").write(compat.as_bytes("testing"))
      with gfile.GFile(file_path, mode="r") as f:
          self.assertEqual("testing", f.read())
  
imports: import os.path
  from tensorboard import test
  from tensorboard.compat.tensorflow_stub import compat, errors
  from tensorboard.compat.tensorflow_stub.io import gfile
label_desc: Use image node_id 6 for calling the FileIoTest obj's underlying member method code with example usage: obj.testWriteBinaryMode() without return types